Armadillos are mammals with a leathery armor shell. The smallest species, the pink fairy armadillo, is roughly chipmunk-sized at 3.0 oz 4.3 in total length. The largest species, the giant armadillo, can be the size of a small pig, weigh up to 130 lb and are over 39 in long.They are prolific diggers. Many species use their sharp claws to dig for food, such as grubs, and to dig dens. baby